Precision Ball Plug Gages Check Spherical and Toroidal Surfaces

Bal-tec Division of Micro Surface Engineering Inc. offers precision ball plug gages made from hardened chrome alloy steel 62 HRC or tungsten carbide by special order.

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Bal-tec Division of Micro Surface Engineering Inc. offers precision ball plug gages made from hardened chrome alloy steel 62 HRC or tungsten carbide by special order. These precision ball plug gages make a radius gage. 

By applying a thin coat of oil-based Prussian blue to the ball plug gage, it becomes an effective method for checking spherical and toroidal surfaces. When the blued ball gage is brought into contact with the test part, it will leave a telltale blue mark at the points of contact.

Ball plug gages are designed to have an advantage over conventional inspection methods. Their spherical shape provides a self-centering line of contact that can be inserted into a hole at any angle. The ball will not stick or bind, allowing it to be used to measure bell mouth and taper. The ball gages are also especially useful for confined areas, even when the actual hole or groove being measured cannot be seen by the inspector.

Two ball gages are frequently used in Go - No Go combinations mounted on a common handle. All plug gages are supplied with handles that meet the American Gage Design Standards unless otherwise specified. 

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